Filtering apparatus.



No. 703,833. Patented luly l, |902.

D. RoJAT.

FILTERING APPARATUS.

(Application led July 24, 1901;) (No Model.) 2 Sheets-Sheet I.

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y n.RoJAT. Q FILTERING APPARATUS.

(Application led July 24, 1901.)

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' Umts@ S'rarns FATENT @unica DAVID ROJAT, OF NIMES, FRANCE.

FILTERING APPARATUS.

SPEGIFIGTIQN forming part of Letters Patent No."703,833,datedJuly 1, 1902.

Apeiimiou sied July 24, 19o-1. serial No. eat-42., (Np moisi.) A

T0 all whom, lit Utrylconccrve:

Beit known that LDAVID RQJAT, a` citizen of the French Republic,residing at Nimes,

Gard, France,fhaveinvented certain new and useful Improvements in 4Filtering Apparatuses, of which the following isa specifica-` tion.

This invention relates to an apparatus for filtering wherein a plurality of filtering devices or elements are employed and adapted to be utilized. singly or successively, as desired. y l

In the accompanying drawings, which illustrate the invention, Figure 1 is a vertical' longitudinal section of the filtering apparatus, and Fig. 2 is a horizontal section at :r2 in Fig. 1 of one of the ltering elements. Fig. 3 is an enlarged side elevation of one of the filtering elements partly broken away to illustrate the construction.

In its general features the filtering apparatus consists/of a rectangular box, preferably mounted on wheels, so as to be portable, and having al hermeticallyclosable cover. The chamber within thisbox is lined with sheet metal and is capable of division into compartments vbysliding transverse vertical partitions. In the chamber and capable-of separation, singly or in groups,.bythesliding partitionsV` are set a pluralityiof filtering elements-seven, as shown in`Fig. 1*.: Pipes,

cocks, and valves are-provided as Vwill be more minutely described.

The inclosingbox 2 has a cover 3,.,with a packing-rin g 22,

The chamber or space within the box is capable of being divided-intocompartments vby vertically-slidable partitions 22, which play in guide grooves or channels in the sides of the box. At one end the box may have supporting-legs32 and ahandle or handles 35, and at the other end supporting-wheels 34 on an axle 33. -Y

The filtering elements in the chamber are or may be alike and one only need be minutely described. The chamber is divided into iiltering-compartments by Walls 19, of perforated metal, forming box-like chambers, and over these is a cover 20, formed of two spaced plates of perforated metal the holes in which should :not register. In each and bothbox andcoverhave" iofithesehox-like chambers is a filter element proper, which willnow be described. Each llilter element consists of a fiat laterally-oblong upright chamber the walls of .which are composed of perforated-metal 154s, an exterior spacing-grid of metal 1G, an outer covering 17, of ,ine-wiregauze, and a coating 9,0 on said gauze of Va .pasteof iilteringvmaterial which serves as the-ii'ltering.body. Fig. 2`shows the shape or form ofthis device-when seen in plan. At its bottom lthis lilter elementis open to the outlet -l for/the ilteredliquidfand at its top it is roofed or covered vwith metal 18 to prevent the entry of liquid atv the, top. In Fig. 3, which shows the construction of the element,.the spacing-grid is formed of coiled wires wrapped about theperforated metal. The fibrous outer coating'orcovering 90 is not shown in this view.. `Itis simply a iibrous material Wrapped orI applied-over the gauze 17. tions 22 separate the kiiltering devices or elements, a single one atthe left and a group comprising the next two. The ypartitions 22 Vslide down through the cover 3 at slots 23,

covered by displaceable strips 24. These partit'ions'areinserted before the filter is put in operation and before thepipes 37 and 38 are in'place. y l

-Theoutlet 4c opensintoa conical union 5, `which-tits intoconicalscrew-nipple G, set in Ythebottom `of the y box 2"and i provided with packingto prevent leakage -at the joint. A nut 8 serves.. to draw ythe'flange of the nipple 6 down rmly on the' packing 7. In a short'pipefQ, connectingthenipple 6 With a vpip'e2, is thecontrolling-cock 10, and above thisth'ere may'be a small vdrainage-cock 11. In the nipple 6 is a sieve or strainer 12, supported at 13. The pipe 9 is coupled to the common pipe 25 by a union 26, and the cock 10 serves to out off communication between the filter element and the pipe 25. Cocks 27, 28, and 30 in the pipe 25 serve to cutoif com- It will be notedthatin'Fig. 1 the partimunicationbetween `the filter elements, and

IOO

with one element. The liquid to be filtered is admitted at the cock-controlled inlet 2l above the plates 20, flows through the latter and down through the spaces between the plates 19 and between the lining 1 and partition 22 and plaies 19, passes into the filter element through the coating 90 and materials 17 and 14, and flows out through the outlets 4 and cocks 10 to thel pipe 25. It then iows up through the upright portion (at the right in Fig. 1) of the pipe 25, through or by the open two-way cock 36, and thence through an upper pipe 37 to an inlet 21a to the second compartment of the filter containing two elements. From this compartment it flows to the pipe 25, between the closed cocks 27 and 28, and thence by the open tWo-way cock 29 to the pipe 3S, which leads it to an inlet 21b into the single element compartment a't the left in Fig. 1. From this compartment it passes again to the pipe 25 and by the open cock 30 to any point desired. The liquid may of course be made to pass, by a suitable arrangement of cocks, pipes, and partitions 22,

through any desired number of elements for clarification. The coat of filtering material 90 may be of any suitably known kind and be of any suitable or desired thickness.

A mixture of pure cellulose and fibers of asbestos makes a good filtering material and is the one preferred. In this case the proportions of these two substances will vary by preference with the number of filtering elements employed in series. Where only two are used, [a suitable proportion will be one hundred parts of cellulose to fifty parts of asbestos, and where four elements are used the proportions of the substances may be equal. n

Near the bottom of the boX 2 is a drainageplug 3l. Therel may be more than one of these.

In order to clean'the filter, the cocks 10 are closed and the liquid drawn or drained off at 31. The cover 3 and plates 2O are removed and the elements in the chambers lifted out. This affords access for cleaning the elements and removing sediment and the like that may have collected. After washing and cleaning the parts arereplaced as before.

.Having thus described my invention, I claim- 1. In altering apparatus, the combination with the outer line casing or box and. its cover, the slidable partitions 22 in said boX for dividing the chamber therein into compartments, and the perforated plates 20, of a plurality of filtering elements mounted in said chambers and separated by said partitions, and pipes and cocks for conducting the liquid to be filtered from one compartment to another and controlling its flow, substantially as set forth.

2. Inaiiltering apparatus, the combination to form a filtering element, of the inner Wall of perforated metal 14, forming a chamber, the spirally-disposed distancing-grid16,about the outside of the metal 14, the gauze covering 17 over said grid, the fibrous filtering coating 90 of cellulose and asbestos, and the roof 18, said element having at its bottom an outlet for the filtered liquid, substantially as set forth.

In witness whereof I have hereunto signed my name, this 5th day of July, 1901,-in the presence of two subscribing witnesses.

DAVID ROJAT.

Witnesses:

PAUL DUPONT. JEAN MARIE PINGoN. 

